To keep good progress, you have to be willing to keep everything balanced. Keeping protein high is great, but are you keeping your fat and carb intake good as well? I know people make carbs out to be the devil, but they're great for energy. If you have a good workout regimen, that's a good start, but watching your intake of certain nutrients helps a lot. If you look into substitutes for certain foods (Low calorie bread, yogurt, oats) that can help you keep your diet clean while also slowly adding up your calorie goal and your nutrients.
Here's a helpful tool for this.